2.10
ELECTRICAL
WIRING
If you must replace the electric power
cable supplied with the boiler, order it exclu-
sively from Sime.
The power supply must be single-phase
230V - 50 Hz through a main switch pro-
tected by a fuse with a distance of at least
3 mm between contacts.
Use only class II room thermostats in com-
pliance with the EN 60730 regulations
NOTE: Device must be connected to an
efficient eathing system. SIME cannot be
held liable for damage to people or things
that is due to non-earthing of the boiler.
Always turn off the power supply before
doing any work on the electrical panel.
42
Fig. 7
2.10.1 Wiring diagram
KEY
A
Control box
ER
Detection electrode
EA
Ignition electrode
EV1
Gas valve coil
EV2
Gas valve coil
V
Fan
PF
Smoke pressure switch
TS
Safety stat
SB
Cotrol box lock-out
TC
Boiler stat
M
Modulator
IG
Main switch
PI
C.H. pump
TA
Room stat
NOTE: Remove jumper 1-4 on the terminal board
while connecting the room thermostat (TA).
